Dinosaurs Grew to Outpace Their Young National Geographic Society/Corbis A newborn titanosaur had to get 2,500 times bigger before it reached adulthood. Some dinosaurs grew to gigantic sizes to avoid competition from their own young, rather than to take advantage of abundant oxygen, high temperatures and large territorial ranges, say two studies. But their largeness may also have proved their undoing. Some have argued that dinosaurs were able to grow quickly and fuel large bodies when temperatures were warm, oxygen levels were high, and land masses such as the supercontinent Gondwana provided abundant living space. But although the idea that certain environmental conditions favoured the growth of enormous dinosaurs has been popular among palaeontologists, there is little evidence for it. Friendly environment The team used thigh-bone lengths to work out the body sizes of more than 400 species alive during the Permian, Triassic and Jurassic periods (299 million to 145 million years ago). Bigger and bigger
List of common misconceptions From Wikipedia, the free encyclopedia This incomplete list is not intended to be exhaustive. This list corrects erroneous beliefs that are currently widely held about notable topics. Each misconception and the corresponding facts have been discussed in published literature. Note that each entry is formatted as a correction; the misconceptions themselves are implied rather than stated. Arts and culture Food and cooking Roll-style Western sushi. Searing meat does not "seal in" moisture, and in fact may actually cause meat to lose moisture. Legislation and crime Literature The Harry Potter books, though they have broken children's book publishing records, have not led to an increase in reading among children or adults, nor slowed the ongoing overall decline in book purchases by Americans, and children who did read the Harry Potter books were not more likely to go on to read more outside of the fantasy and mystery genres. Music Religion Hebrew Bible Buddhism Christianity Islam Sports
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Triumph of the Titans: How Sauropods Flourished Ever since fossils of the behemoth, long-necked dinosaurs known as sauropods surfaced in England nearly 170 years ago, they have awed and confused scientists. Even when the great English anatomist Sir Richard Owen recognized in 1842 that dinosaurs constituted a group of their own, apart from reptiles, he excluded the gigantic bones later classified as sauropods. Instead he interpreted them as belonging to a type of aquatic crocodile, which he had named Cetiosaurus, or “whale lizard,” for the enormous size of its bones. Phillips’s assessment caused considerable consternation among paleontologists for decades—they just could not conceive how such a massive animal could support its weight on land. Select an option below: Customer Sign In *You must have purchased this issue or have a qualifying subscription to access this content
Breathingearth - CO2, birth & death rates by country, simulated real-time Giant Flea-Like Pest Put the Bite on Dinosaurs Paleo-pests about 10 times bigger than today's fleas may have sneaked up on a huge dinosaur, crawled onto its soft underbelly and taken a bite, likely a painful one, say researchers who have discovered fossils of the flealike organisms. "It would have felt about like a hypodermic needle going in, a flea shot, if not a flu shot," George Poinar Jr., a professor emeritus of zoology at Oregon State University, said in a statement. "We can be thankful our modern fleas are not nearly this big," said Poinar, who wrote a commentary alongside the research article published online April 24 in the journal Current Biology. One possible lifesaver for dinosaurs: These bloodsuckers couldn't jump like today's pesky fleas. Even so, past research suggests dinosaurs may have also been the first beasts tormented by lice. The fossils of the two newly identified "flea" species, now called Pseudopulex jurassicus and Pseudopulex magnus, were discovered in Inner Mongolia. More dino fleas?
anonymoX Mini-mammoths lived on Crete The carcass of the world's most well-preserved baby mammoth, named Lyuba, who was discovered in Russia's Yamal Peninsula in 2007. Dwarf mammoths in Crete tended to share the physical characteristics of the infant versions of their ancestors. Credit: AFP PARIS: The smallest-ever mammoth roamed Crete up to 3.5 million years ago, measuring some four feet (just over a metre) at the shoulder, the size of a baby elephant today, said a study published Wednesday. Mammuthus creticus weighed in at about 310 kilogrammes (680 pounds) and probably had no woolly coat unlike some of its relatives, study author Victoria Herridge, adding that the animal was “probably quite cute.” “If you were to reconstruct it, I would say OK, make it look a bit like a baby elephant but probably chunkier … with sort of thicker limbs, stockier, and as an adult it would have had curly tusks. “You’d be a bit intimidated” “The nearest image you’re going to get is a baby Asian elephant, but with tusks.”
Using Appropriate Terminology Function not purpose The purpose of a hammer is to pound nails. One function of a hand is to hold a hammer. Designed tools have purposes. Evidence not proof We often hear news stories in which the narrator refers to having “enough proof.” Primitive and advanced The average person might see an opossum as more primitive than a cat. Theory vs. hypothesis A theory is an explanation. A hypothesis is a testable idea. Believe or accept “Do you believe in evolution?”